| cheilosis | (noun) a disorder of the lips marked by scaling and fissures at the corners of the mouth; caused by a deficiency of riboflavin | Synonyms: perleche |
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| chela | (noun) a Hindu disciple of a swami | - |
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| (noun) a grasping structure on the limb of a crustacean or other arthropods | Synonyms: claw, nipper, pincer |
| chelate | (noun) a heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions | Synonyms: chelate compound |
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| chelation | (noun) the process of forming a ring by forming one or more hydrogen bonds | - |
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| (noun) (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning | - |
| chelicera | (noun) either of the first pair of fang-like appendages near the mouth of an arachnid; often modified for grasping and piercing | - |
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| cheloid | (noun) raised pinkish scar tissue at the site of an injury; results from excessive tissue repair | Synonyms: keloid |
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| chelonian | (noun) a reptile of the order Chelonia | Synonyms: chelonian reptile |
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| chemical | (noun) material produced by or used in a reaction involving changes in atoms or molecules | Synonyms: chemical substance |
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| chemiluminescence | (noun) luminescence resulting from a chemical reaction as the oxidation of luciferin in fireflies | - |
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| chemise | (noun) a loose-fitting dress hanging straight from the shoulders without a waist | Synonyms: sack, shift |
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| (noun) a woman's sleeveless undergarment | Synonyms: shift, shimmy, slip, teddy |
| chemisorption | (noun) adsorption (especially when irreversible) by means of chemical instead of physical forces | Synonyms: chemosorption |
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| chemist | (noun) a scientist who specializes in chemistry | - |
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| (noun) a health professional trained in the art of preparing and dispensing drugs | Synonyms: apothecary, druggist, pharmacist, pill pusher, pill roller |
| chemistry | (noun) the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions | Synonyms: chemical science |
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| (noun) the way two individuals relate to each other | Synonyms: alchemy, interpersonal chemistry |
| (noun) the chemical composition and properties of a substance or object | - |
| chemoattractant | (noun) a substance inducing positive chemotaxis in motile cells. | - |
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| chemoautotroph | (noun) An organism that depends on chemicals for its energy and principally on carbon dioxide for its carbon. | Synonyms: chemotrophic autotroph |
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| chemoimmunology | (noun) the field of chemistry concerned with chemical processes in immunology (such as chemical studies of antigens and antibodies) | Synonyms: immunochemistry |
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| chemoreceptor | (noun) a sensory receptor that responds to chemical stimuli | - |
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| chemosis | (noun) edema of the mucous membrane of the eyeball and eyelid lining | - |
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| chemosorption | (noun) adsorption (especially when irreversible) by means of chemical instead of physical forces | Synonyms: chemisorption |
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| chemosurgery | (noun) use of chemical to destroy diseased or malignant tissue; used in treatment of skin cancer | - |
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| chemosynthesis | (noun) synthesis of carbohydrate from carbon dioxide and water; limited to certain bacteria and fungi | - |
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| chemotaxis | (noun) movement by a cell or organism in reaction to a chemical stimulus | - |
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| chemotherapy | (noun) the use of chemical agents to treat or control disease (or mental illness) | - |
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| chenfish | (noun) small silvery marine food fish found off California | Synonyms: Genyonemus lineatus, kingfish, white croaker |
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| chenille | (noun) a heavy fabric woven with chenille cord; used in rugs and bedspreads | - |
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| (noun) a soft tufted cord used in embroidery | Synonyms: chenille cord |
| cheque | (noun) a written order directing a bank to pay money | Synonyms: bank check, check |
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| chequebook | (noun) a book issued to holders of checking accounts | Synonyms: checkbook |
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| chequer | (noun) one of the flat round pieces used in playing the game of checkers | Synonyms: checker |
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| chequerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, checkerboard |
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| cherimolla | (noun) large tropical fruit with leathery skin and soft pulp; related to custard apples | Synonyms: cherimoya |
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| cherimoya | (noun) large tropical fruit with leathery skin and soft pulp; related to custard apples | Synonyms: cherimolla |
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| (noun) small tropical American tree bearing round or oblong fruit | Synonyms: Annona cherimola, cherimoya tree |
| cheroot | (noun) a cigar with both ends cut flat | - |
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| cherry | (noun) a red the color of ripe cherries | Synonyms: cerise, cherry red |
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| (noun) a red fruit with a single hard stone | - |
| (noun) any of numerous trees and shrubs producing a small fleshy round fruit with a single hard stone; many also produce a valuable hardwood | Synonyms: cherry tree |
| (noun) wood of any of various cherry trees especially the black cherry | - |
| cherrystone | (noun) a half-grown quahog | Synonyms: cherrystone clam |
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| (noun) small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino | Synonyms: cherrystone clam |
| chert | (noun) variety of silica containing microcrystalline quartz | - |
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| cherub | (noun) an angel of the second order whose gift is knowledge; usually portrayed as a winged child | - |
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| (noun) a sweet innocent baby | - |
| chervil | (noun) fresh ferny parsley-like leaves used as a garnish with chicken and veal and omelets and green salads and spinach | - |
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| (noun) aromatic annual Old World herb cultivated for its finely divided and often curly leaves for use especially in soups and salads | Synonyms: Anthriscus cereifolium, beaked parsley |
| chess | (noun) a board game for two players who move their 16 pieces according to specific rules; the object is to checkmate the opponent's king | Synonyms: chess game |
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| (noun) weedy annual native to Europe but widely distributed as a weed especially in wheat | Synonyms: Bromus secalinus, cheat |
| chessboard | (noun) a checkerboard used to play chess | Synonyms: chess board |
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| chessman | (noun) any of 16 white and 16 black pieces used in playing the game of chess | Synonyms: chess piece |
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| chest | (noun) box with a lid; used for storage; usually large and sturdy | - |
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| (noun) furniture with drawers for keeping clothes | Synonyms: bureau, chest of drawers, dresser |
| (noun) the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates | Synonyms: pectus, thorax |
| (noun) the front of the trunk from the neck to the abdomen | Synonyms: breast |
| chesterfield | (noun) a fitted overcoat with a velvet collar | - |
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| (noun) an overstuffed davenport with upright armrests | - |
| chestnut | (noun) a dark golden-brown or reddish-brown horse | - |
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| (noun) a small horny callus on the inner surface of a horse's leg | - |
| (noun) the brown color of chestnuts | - |
| (noun) edible nut of any of various chestnut trees of the genus Castanea | - |
| (noun) any of several attractive deciduous trees yellow-brown in autumn; yield a hard wood and edible nuts in a prickly bur | Synonyms: chestnut tree |
| (noun) wood of any of various chestnut trees of the genus Castanea | - |
| chetah | (noun) long-legged spotted cat of Africa and southwestern Asia having nonretractile claws; the swiftest mammal; can be trained to run down game | Synonyms: Acinonyx jubatus, cheetah |
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| chetrum | (noun) 100 chetrums equal 1 ngultrum in Bhutan | - |
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| chevalier | (noun) a gallant or courtly gentleman | Synonyms: cavalier |
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| chevre | (noun) made from goats' milk | Synonyms: goat cheese |
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| chevron | (noun) an inverted V-shaped charge | - |
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| (noun) V-shaped sleeve badge indicating military rank and service | Synonyms: grade insignia, stripe, stripes |
| chevrotain | (noun) very small hornless deer-like ruminant of tropical Asia and west Africa | Synonyms: mouse deer |
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| chew | (noun) biting and grinding food in your mouth so it becomes soft enough to swallow | Synonyms: chewing, manduction, mastication |
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| (noun) a wad of something chewable as tobacco | Synonyms: chaw, cud, plug, quid, wad |
| chewer | (noun) someone who chews (especially someone who chews tobacco) | - |
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| chewing | (noun) biting and grinding food in your mouth so it becomes soft enough to swallow | Synonyms: chew, manduction, mastication |
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| chewink | (noun) common towhee of eastern North America | Synonyms: cheewink, Pipilo erythrophthalmus |
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| chincherinchee | (noun) South African perennial with long-lasting spikes of white blossoms that are shipped in to Europe and America for use as winter cut flowers | Synonyms: Ornithogalum thyrsoides, wonder flower |
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| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| chlorhexidine | (noun) a long-lasting liquid antiseptic; used by surgeons to wash their hands before performing surgery | - |
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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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| chokecherry | (noun) a common wild cherry of eastern North America having small bitter black berries favored by birds | Synonyms: chokecherry tree, Prunus virginiana |
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| (noun) the fruit of the chokecherry tree | - |
| choreographer | (noun) someone who creates new dances | - |
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| chromaesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromesthesia |
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| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| chromosphere | (noun) a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun | - |
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| chrysanthemum | (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated | - |
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| (noun) the flower of a chrysanthemum plant | - |
| chrysotherapy | (noun) the use of chemicals containing gold for treating diseases (such as rheumatoid arthritis) | - |
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| cinematographer | (noun) a photographer who operates a movie camera | Synonyms: camera operator, cameraman |
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| cipher | (noun) a secret method of writing | Synonyms: cryptograph, cypher, secret code |
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| (noun) a message written in a secret code | Synonyms: cypher |
| (noun) a person of no influence | Synonyms: cypher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cypher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cypher, nought, zero |
| cither | (noun) a musical stringed instrument with strings stretched over a flat sounding board; it is laid flat and played with a plectrum and with fingers | Synonyms: zither, zithern |
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| (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cithern, citole, cittern, gittern |
| cithern | (noun) a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings | Synonyms: cither, citole, cittern, gittern |
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| clamshell | (noun) the shell of a clam | - |
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| (noun) a dredging bucket with hinges like the shell of a clam | Synonyms: grapple |
| cleistothecium | (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration | Synonyms: cleistocarp |
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| clerihew | (noun) a witty satiric verse containing two rhymed couplets and mentioning a famous person | - |
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| cliche | (noun) a trite or obvious remark | Synonyms: banality, bromide, commonplace, platitude |
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| clincher | (noun) a tool used to clinch nails or bolts or rivets | - |
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| (noun) a point or fact or remark that settles something conclusively | Synonyms: decisive factor |
| (noun) an argument that is conclusive | Synonyms: determiner, determining factor |
| cloche | (noun) a woman's close-fitting hat that resembles a helmet | - |
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| (noun) a low transparent cover put over young plants to protect them from cold | - |
| clomiphene | (noun) a fertility drug (trade name Clomid) that is used to stimulate ovulation and that has been associated with multiple births | Synonyms: Clomid, clomiphene citrate |
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| clothes | (noun) clothing in general | Synonyms: apparel, dress, wearing apparel |
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| clothesbrush | (noun) a brush used for cleaning clothing | - |
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| clotheshorse | (noun) a framework on which to hang clothes (as for drying) | - |
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| (noun) a man who is much concerned with his dress and appearance | Synonyms: beau, dandy, dude, fashion plate, fop, gallant, sheik, swell |
| clothesline | (noun) a cord on which clothes are hung to dry | - |
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| clothespin | (noun) wood or plastic fastener; for holding clothes on a clothesline | Synonyms: clothes peg, clothes pin |
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| clothespress | (noun) a closet where clothes are stored | Synonyms: clothes closet |
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| clubhead | (noun) (golf) the head of the club which strikes the ball | Synonyms: club-head, club head, golf-club head |
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| clutches | (noun) the act of grasping | Synonyms: clasp, clench, clutch, grasp, grip, hold |
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| cockleshell | (noun) a small light flimsy boat | - |
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| cogwheel | (noun) a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion | Synonyms: gear, gear wheel, geared wheel |
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| coherence | (noun) logical and orderly and consistent relation of parts | Synonyms: coherency |
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| (noun) the state of cohering or sticking together | Synonyms: coherency, cohesion, cohesiveness |
| coherency | (noun) logical and orderly and consistent relation of parts | Synonyms: coherence |
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| (noun) the state of cohering or sticking together | Synonyms: coherence, cohesion, cohesiveness |
| cohesion | (noun) (physics) the intermolecular force that holds together the molecules in a solid or liquid | - |
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| (noun) (botany) the process in some plants of parts growing together that are usually separate (such as petals) | - |
| (noun) (linguistics) the grammatical and lexical linking within a text or sentence that holds a text together and gives it meaning. | - |
| (noun) the state of cohering or sticking together | Synonyms: coherence, coherency, cohesiveness |
| cohesiveness | (noun) the property of being cohesive and sticky | Synonyms: glueyness, gluiness, gumminess, ropiness, tackiness, viscidity, viscidness |
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| (noun) the state of cohering or sticking together | Synonyms: coherence, coherency, cohesion |
| coldheartedness | (noun) an absence of concern for the welfare of others | Synonyms: hardheartedness, heartlessness |
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| comprehensibility | (noun) the quality of comprehensible language or thought | Synonyms: understandability |
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| comprehension | (noun) an ability to understand the meaning or importance of something (or the knowledge acquired as a result) | - |
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| (noun) the relation of comprising something | Synonyms: inclusion |
| comprehensive | (noun) an intensive examination testing a student's proficiency in some special field of knowledge | Synonyms: comp, comprehensive examination |
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| comprehensiveness | (noun) the capacity to understand a broad range of topics | Synonyms: breadth, largeness |
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| (noun) completeness over a broad scope | Synonyms: fullness |
| copperhead | (noun) common coppery brown pit viper of upland eastern United States | Synonyms: Agkistrodon contortrix |
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| (noun) venomous but sluggish reddish-brown snake of Australia | Synonyms: Denisonia superba |
| cosmographer | (noun) a scientist knowledgeable about cosmography | Synonyms: cosmographist |
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| couchette | (noun) a compartment on a European passenger train; contains 4 to 6 berths for sleeping | - |
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| (noun) a sleeping berth in a couchette compartment. | - |
| countercheck | (noun) something that checks the correctness of a previous check | Synonyms: double check |
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| (noun) a check that restrains another check | - |
| cowcatcher | (noun) an inclined metal frame at the front of a locomotive to clear the track | Synonyms: buffer, fender, pilot |
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| cowherb | (noun) European annual with pale rose-colored flowers; cultivated flower or self-sown grainfield weed; introduced in North America; sometimes classified as a soapwort | Synonyms: cow cockle, Saponaria vaccaria, Vaccaria hispanica, Vaccaria pyramidata |
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